Re: FUNCTION POINTER IN C AND C++ - C / C++ / MFC Discussion Boards

swaapu5-Feb-06 23:18

5-Feb-06 23:18

Hi!!
I m working on an mfc sdi application.
I hav a dialog in which , i have "SHOW FILE" button. On it`s click event, i want to show the file on the same dialog. But, before clicking the "SHOW FILE" button, i want a small dialog only. Now, I hav two problems:
1. In which control, should I display(show) the file to the user?
2. How to set the dialog size at run time?

Thanx a lot

"If you change then change for the good."

Re: setting dialog size at run time

_anil_5-Feb-06 23:51

_anil_

5-Feb-06 23:51

ABout your first question which type of file do you want to display? image file, text file, HTML file....

for changing the dialog box size...

MoveWindow()
SetWindowPos()
...

Re: setting dialog size at run time

swaapu6-Feb-06 0:08

swaapu

6-Feb-06 0:08

Hello!!
I want to display text file.
Thanx a lot

"If you change then change for the good."

Re: setting dialog size at run time

_anil_6-Feb-06 0:17

_anil_

6-Feb-06 0:17

Hello
For Text File you can use CEdit Control with Multiline option set.

Or if your file size is large and you want some extra thigs to display like changing the colour of text ...
you car use RichEditControl.

Regards
Anil

Vertical Orientation in CStatic with word wrap

GayathriNaveen5-Feb-06 22:33

GayathriNaveen

5-Feb-06 22:33

Hi ,
I want to display vertical text in a CStatic text box which has the word wrap facility.
can anyone help me with an example.

Thanks,
Gayathri

Re: Vertical Orientation in CStatic with word wrap

_anil_6-Feb-06 0:26

_anil_

6-Feb-06 0:26

Hi
Try to find out at this site...

http://www.codeguru.com/Cpp/controls/staticctrl/article.php/c2927/

Regards
Anil

FUNCTION POINTER IN C AND C++

phijophlip5-Feb-06 22:24

phijophlip

5-Feb-06 22:24

Hello Friends,

Can any one tell where I can find the study materials (on the internet) for function pointer in C and C++ ?

How function pointer are used in the implementation of callback function in c and c++?

Where I can complete details of function pointer on the internet(where I can freely download demo codes for function pointers in c OR CPP).

I would be gratefull if anybody can help me in this matter

From
Philip.
Smile | :)

-- modified at 4:26 Monday 6th February, 2006

Re: FUNCTION POINTER IN C AND C++

Owner drawn5-Feb-06 22:31

Owner drawn

5-Feb-06 22:31

http://www.function-pointer.org/[^]

Owner drawn
Jesus Loves

Re: FUNCTION POINTER IN C AND C++

toxcct5-Feb-06 22:45

toxcct

5-Feb-06 22:45

why don't you ask here particuliar questions about function pointers ?
there are definitely several C/C++ experts which can help much than reading lines on the internet...

for demos also, there are plenty of examples on CodeProject too...

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VCalc 3.0 soon...]

Re: FUNCTION POINTER IN C AND C++

ThatsAlok6-Feb-06 0:48

ThatsAlok

6-Feb-06 0:48

phijophlip wrote:
Where I can complete details of function pointer on the internet(where I can freely download demo codes for function pointers in c OR CPP)

http://www.codeproject.com/cpp/FastDelegate.asp[^]

http://www.codeproject.com/cpp/mem_fun_bind.asp[^]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Class view is not showing the whole classes in my project

BiswaR5-Feb-06 22:16

BiswaR

5-Feb-06 22:16

Hi Guys,
First of all i really thank to all as i got all the answers to my doubts.

This time i have some interesting problem. In my projects thre are more than 300 classes. But in the class view it's only showing 1 class. Another interesting the same code when it was in the original directory its showing all the classes but when i placed the same code in a different folder it's showing only one class. My team mates are also facing the same problem. Please help me if you know the reason.

Re: Class view is not showing the whole classes in my project

Iain Clarke, Warrior Programmer5-Feb-06 22:35

Iain Clarke, Warrior Programmer

5-Feb-06 22:35

Sometimes Visual C++ 6 class view dies, and you need to make it look again at your classes.

Close visual c++
using taskmanager, kill the msdev process if it doesn't go away quickly.
go to the location of your project.
delete the .ncb file. (eg. myproj.ncb)

rerun vc++.
expand a project in the class view. see the "1983 files to go" line get smaller
enjoy all your classes!

Of course, this applies to v6. I have no idea about 2003-2005, etc.

Iain.

Re: Class view is not showing the whole classes in my project

Garth J Lancaster5-Feb-06 22:39

Garth J Lancaster

5-Feb-06 22:39

I'm not sure wether the number of classes is a factor here .. everytime I have issues with the class display/wizard, I follow the same procedure :-

1) Shut down the project
2) find and delete the .clw file
3) start up the project, bring up the class wizard
4) let msvc regenerate the info using 'all files'

the details can be found here :-

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/HTML/_core_rebuilding_the_classwizard_.28...clw.29_.file.asp[^]

ymmv

'g'

drag an item from ListCtrl to system-shell

suchuhui5-Feb-06 22:04

suchuhui

5-Feb-06 22:04

I want to implement a function like this.drag an item from a ListCtrl to system-shell (I mean the explorer ) ,when the item is dropped I wann get the destination where it 's drogged to (I wann get the full path)? just like WinRar,file can be dragged from a compression package to wherever the user indicate .

not need to offer me the whole code,just give me the vital one.
thanks ahead.

Re: drag an item from ListCtrl to system-shell

suchuhui8-Feb-06 14:49

suchuhui

8-Feb-06 14:49

what ever technology does winRar use ?

problem in retrieving Primarykeys from microsoft access Database

Issa Salama5-Feb-06 21:56

Issa Salama

5-Feb-06 21:56

Hi all
i have a problem in retrieving primarykeys form microsoft access database (by catalog2 example offered by msdn help),
when i request the SQLPrimaryKeys API function, no results returned to me, and when i called the SQL_API_SQLPRIMARYKEYS API to be sure that the ODBC driver support the SQLPrimaryKeys function, the result was that the system doesn't support this API function (ODBC version 3.x)
If any one faced this problem, please inform me who can i solve it

Subclassing problem

mikobi5-Feb-06 21:38

mikobi

5-Feb-06 21:38

I subclass an Edit Control(whose Id is IDC_quantite) by Cnumeric(class that control if the caracters are numerics or not).
How can I activate the OnKillFocus message related to this edit control ?

I learn my self

Re: Subclassing problem

Anilkumar K V5-Feb-06 22:00

Anilkumar K V

5-Feb-06 22:00

Use WM_KILLFOCUS messgae

Re: Subclassing problem

mikobi5-Feb-06 22:09

mikobi

5-Feb-06 22:09

I know that i must use WM_KILLFOCUS but how to do it from my Cnumeric class because when I write now i am writting on object of class Cnumeric but how can I send a message to the first class CEdit

Re: Subclassing problem

mikobi5-Feb-06 22:11

mikobi

5-Feb-06 22:11

I have try fromCnumeric class this but it not working
void CNumericEdit::OnKillfocus()
{

CWnd::GetParent()->PostMessage(WM_KILLFOCUS,0,0);

}

Re: Subclassing problem

Owner drawn5-Feb-06 22:29

Owner drawn

5-Feb-06 22:29

I guess you would like to call the base class handler.

Replace

CWnd::GetParent()->PostMessage(WM_KILLFOCUS,0,0);

With

CEdit::OnKillFocus();

Owner drawn
Jesus Loves

Re: Subclassing problem

mikobi5-Feb-06 22:40

mikobi

5-Feb-06 22:40

If it's true, this message will be sended to all CEdit, it's not possible to send it to exactly one object CEdit where i prefere ?

Re: Subclassing problem

Owner drawn5-Feb-06 22:57

Owner drawn

5-Feb-06 22:57

It won't goto all but only to the corresponding CNumeric's base class i.e. CEdit. It won't affect any other.

Owner drawn
Jesus Loves

CString erased without reason ?

RadioOpa5-Feb-06 21:03

RadioOpa

5-Feb-06 21:03

csUserName and csComputerName contain valid entries. As soon as the instance of a Recordset Class is created, both are erased. Interesting: The CString Object csSqlStatement is not erased.

code sniplet:
CString csComputerName; // Speichert den Hostnamen des PCs
CString csUserName; // Speichert den UserNamen ( Windows)
CString csTimeNow; // Speichert die Uhrzeit
CString csConnectionString; // Verbindungs Daten

// Hole aktuelle Zeit
COleDateTime coTimeNow(COleDateTime::GetCurrentTime());

csTimeNow.Format( "%04d.%02d.%02d %02d:%02d:%02d", coTimeNow.GetYear(),
coTimeNow.GetMonth(),
coTimeNow.GetDay(),
coTimeNow.GetHour(),
coTimeNow.GetMinute(),
coTimeNow.GetSecond());

// Hole Hostnamen
DWORD dwHostLength = MAX_COMPUTERNAME_LENGTH + 1;
GetComputerName( csComputerName.GetBuffer( 0), &dwHostLength);

// Hole UserNamen
DWORD dwUserLength = UNLEN + 1;
GetUserName( csUserName.GetBuffer( 0), &dwUserLength);

// Instanz zur Datenbank aufbauen
csConnectionString = "DSN=ODR_CRM;UID=ODRGMBH;PWD=origin";

m_pDB = new CDatabase();
if( m_pDB->OpenEx(csConnectionString, CDatabase::noOdbcDialog))
{

// We´re connected to the database
}
else
{
// we have a problem connecting to the database

}

// !!!!!
// ! Next statement will erase csComputerName and csUserName !

// Access to Class Protokoll Table
m_pProtocol = new CProtokoll( m_pDB);

m_pProtocol->Open(); // ready to use

Re: CString erased without reason ?

Ryan Binns5-Feb-06 21:43

Ryan Binns

5-Feb-06 21:43

You have to pass a length to CString::GetBuffer(). By passing 0, you're allocating a buffer of 0 bytes to receive the computer name in, but telling GetComputerName() there is actually "dwHostLength" bytes. That's just asking for trouble. Similarly for the user name.

Also, when you call GetBuffer(), you have to call ReleaseBuffer() afterwards. Put in the call to ReleaseBuffer() straight after the call to GetComputerName() (and GetUserName()).

Ryan

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